Mandrel for squaring pistons



C. E FOLK MANDREL FOR SQUARING PISTONS. FILED AUG. 26, 1920.

Jan. 2, m3. 1,44@,4s@

HARLES EOLIQ, OE EALTIEZOELE, MARYLAND.

EEA'NDBEL FOB SQUABING- PI$TQNS Application filed August 1'2 To all whomit may cancer? Be it known that l, CHARLES E. Four, a citizen of theJnited States, residing at Baltimore, in the State of Maryland, haveinvented certain. new and useful improvements in l /landrels forSquaring Pistons, oi which the following is a specification.

The invention relates to improvements in mandrels for squaring pistons,and has for its object to provide a simple, cheap and etficient devicefor setting pistons through on the crank shaftv The invention consistsof the novel construction and arrangement of the parts and combinationof parts hereinafter more fully s forth in the following specificationand Cl) pointed out in detail in the appended claim. in the accompanyingdrawing,

Figure l is a side view of my invention projecting through the end of aconnecting rod and showing the piston being squared thereon.

Figure 2 is an enlarged side view of the mandrel.

Figure 3 is an end view of Figure 2.

Referring to the accompanying drawing forming part of this specificationand in which like reference numerals designate like parts throughout theseveral views thereof, 1 designates the mandrel which is round at oneend and has its opposite end cut away to form the flat top 2 and sides3, the that upper side 2 being for the purpose of hold- 6, 1920. Seriall lo. 406,204.

ing the square when the piston is being squared on the connecting rod.The flat sides 3 are clam "Jed between a vice (not shown) or othersuitable tool for holding the mandrel when in use. The end of themandrel having the fiat top and sides is smaller in diameter than therounded end.

ine round one ol the mandrel 1 is placed in the end of the connectingrod 4} as shown in Figure l, and the square 5 is placed on the flatsurface 2 of the mandrel with its upper edge projecting against theouter surot' the piston 6 and when the latter is perfectly square on therod lthe mandrel l is removed from the rod 4- and piston 's thenconnected up to the crank shaft of he engine. The edges 7 of the uppersurface 2 is slightly bevelled to prevent injury to the said surface 2when the device is clamped in a vice or other holding means.

I ugthus described my invention what

